diff --git a/jslib b/jslib
index 8438cafbd0..2858724f44 160000
--- a/jslib
+++ b/jslib
@@ -1 +1 @@
-Subproject commit 8438cafbd08c1c9b1440e0c5385e15e8fb5ac524
+Subproject commit 2858724f4431038be190fc0b748efe287dd1bae6
diff --git a/src/commands/completion.command.ts b/src/commands/completion.command.ts
index 289377c608..88cbf28caa 100644
--- a/src/commands/completion.command.ts
+++ b/src/commands/completion.command.ts
@@ -1,55 +1,81 @@
-import * as program from "commander";
-import { Response } from "jslib/cli/models/response";
-import { MessageResponse } from "jslib/cli/models/response/messageResponse";
+import * as program from 'commander';
 
-type Option = {
+import { Response } from 'jslib/cli/models/response';
+import { MessageResponse } from 'jslib/cli/models/response/messageResponse';
+
+interface IOption {
     long: string;
     short: string;
     description: string;
-};
+}
 
-type Command = {
-    commands?: Command[];
-    options?: Option[];
+interface ICommand {
+    commands?: ICommand[];
+    options?: IOption[];
     _name: string;
     _description: string;
-};
+}
 
-const zshCompletion = (rootName: string, rootCommand: Command) => {
-    const renderCommandBlock = (name: string, command: Command): string => {
+const validShells = ['zsh'];
+
+export class CompletionCommand {
+    async run(cmd: program.Command) {
+        const shell: typeof validShells[number] = cmd.shell;
+
+        if (!shell) {
+            return Response.badRequest('`shell` was not provided.');
+        }
+
+        if (!validShells.includes(shell)) {
+            return Response.badRequest('Unsupported shell.');
+        }
+
+        let content = '';
+
+        if (shell === 'zsh') {
+            content = this.zshCompletion('bw', cmd.parent).render();
+        }
+
+        const res = new MessageResponse(content, null);
+        return Response.success(res);
+    }
+
+    private zshCompletion(rootName: string, rootCommand: ICommand) {
+        return {
+            render: () => {
+                return [
+                    `#compdef _${rootName} ${rootName}`,
+                    '',
+                    this.renderCommandBlock(rootName, rootCommand),
+                ].join('\n');
+            },
+        };
+    }
+
+    private renderCommandBlock(name: string, command: ICommand): string {
         const { commands = [], options = [] } = command;
         const hasOptions = options.length > 0;
         const hasCommands = commands.length > 0;
 
-        const _arguments = options
+        const args = options
             .map(({ long, short, description }) => {
                 const aliases = [short, long].filter(Boolean);
-
-                const OPTS = aliases.join(",");
-
-                const DESCRIPTION = `[${description.replace("'", `'"'"'`)}]`;
-
-                return aliases.length > 1
-                    ? `'(${aliases.join(" ")})'{${OPTS}}'${DESCRIPTION}'`
-                    : `'${OPTS}${DESCRIPTION}'`;
-            })
-            .concat(
-                `'(-h --help)'{-h,--help}'[output usage information]'`,
+                const opts = aliases.join(',');
+                const desc = `[${description.replace(`'`, `'"'"'`)}]`;
+                return aliases.length > 1 ? `'(${aliases.join(' ')})'{${opts}}'${desc}'` : `'${opts}${desc}'`;
+            }).concat(`'(-h --help)'{-h,--help}'[output usage information]'`,
                 hasCommands ? '"1: :->cmnds"' : null,
-                '"*::arg:->args"'
-            )
-            .filter(Boolean);
+                '"*::arg:->args"',
+            ).filter(Boolean);
 
         const commandBlockFunctionParts = [];
 
         if (hasCommands) {
-            commandBlockFunctionParts.push("local -a commands");
+            commandBlockFunctionParts.push('local -a commands');
         }
 
         if (hasOptions) {
-            commandBlockFunctionParts.push(
-                `_arguments -C \\\n    ${_arguments.join(` \\\n    `)}`
-            );
+            commandBlockFunctionParts.push(`_arguments -C \\\n    ${args.join(` \\\n    `)}`);
         }
 
         if (hasCommands) {
@@ -57,79 +83,28 @@ const zshCompletion = (rootName: string, rootCommand: Command) => {
                 `case $state in
     cmnds)
       commands=(
-        ${commands
-            .map(({ _name, _description }) => `"${_name}:${_description}"`)
-            .join("\n        ")}
+        ${commands.map(({ _name, _description }) => `"${_name}:${_description}"`).join('\n        ')}
       )
       _describe "command" commands
       ;;
   esac
 
   case "$words[1]" in
-    ${commands
-        .map(({ _name }) =>
-            [`${_name})`, `_${name}_${_name}`, ";;"].join("\n      ")
-        )
-        .join("\n    ")}
-  esac`
+    ${commands.map(({ _name }) => [`${_name})`, `_${name}_${_name}`, ';;'].join('\n      ')).join('\n    ')}
+  esac`,
             );
         }
 
         const commandBlocParts = [
-            `function _${name} {\n  ${commandBlockFunctionParts.join(
-                "\n\n  "
-            )}\n}`,
+            `function _${name} {\n  ${commandBlockFunctionParts.join('\n\n  ')}\n}`,
         ];
 
         if (hasCommands) {
             commandBlocParts.push(
-                commands
-                    .map((command) =>
-                        renderCommandBlock(`${name}_${command._name}`, command)
-                    )
-                    .join("\n\n")
+                commands.map((c) => this.renderCommandBlock(`${name}_${c._name}`, c)).join('\n\n'),
             );
         }
 
-        return commandBlocParts.join("\n\n");
-    };
-
-    const render = () => {
-        return [
-            `#compdef _${rootName} ${rootName}`,
-            "",
-            renderCommandBlock(rootName, rootCommand),
-        ].join("\n");
-    };
-
-    return {
-        render,
-    };
-};
-
-const validShells = ["zsh"];
-
-export class CompletionCommand {
-    constructor() {}
-
-    async run(cmd: program.Command) {
-        const shell: typeof validShells[number] = cmd.shell;
-
-        if (!shell) {
-            return Response.badRequest("`shell` was not provided!");
-        }
-
-        if (!validShells.includes(shell)) {
-            return Response.badRequest(`Unsupported shell!`);
-        }
-
-        let content = "";
-
-        if (shell === "zsh") {
-            content = zshCompletion("bw", cmd.parent).render();
-        }
-
-        const res = new MessageResponse(content, null);
-        return Response.success(res);
+        return commandBlocParts.join('\n\n');
     }
 }
diff --git a/src/program.ts b/src/program.ts
index beb1d7791b..f9dbb5b842 100644
--- a/src/program.ts
+++ b/src/program.ts
@@ -669,7 +669,7 @@ export class Program extends BaseProgram {
             .on('--help', () => {
                 writeLn('\n  Notes:');
                 writeLn('');
-                writeLn('    Valid shells are `zsh`.')
+                writeLn('    Valid shells are `zsh`.');
                 writeLn('');
                 writeLn('  Examples:');
                 writeLn('');
@@ -680,7 +680,7 @@ export class Program extends BaseProgram {
                 const command = new CompletionCommand();
                 const response = await command.run(cmd);
                 this.processResponse(response);
-            })
+            });
 
         program
             .parse(process.argv);