Add textwidth configuration variable.

README.md

@@ -105,6 +105,10 @@ The following is a subset of the supported configurations; the full list is desc
   * Copy indent from current line when starting a new line
   * Type: Boolean (Default: `true`)
 
+#### textwidth
+  * Width to word-wrap to when using `gq`.
+  * Type: number (Default: `80`)
+
 ## Configure
 
 Vim options are loaded in the following sequence:

package.json

@@ -297,6 +297,11 @@
           "description": "keywords contain alphanumeric characters and '_'",
           "default": "/\\()\"':,.;<>~!@#$%^&*|+=[]{}`?-"
         },
+        "vim.textwidth": {
+          "type": "number",
+          "description": "Width to word-wrap to when using gq.",
+          "default": 80
+        },
         "vim.ignorecase": {
           "type": "boolean",
           "description": "Ignore case in search patterns.",

src/actions/actions.ts

@@ -3979,7 +3979,7 @@ class ActionVisualReflowParagraph extends BaseCommand {
   }
 
   public reflowParagraph(s: string, indentLevel: number): string {
-    let maximumLineLength = 80 - indentLevel - 2;
+    const maximumLineLength = Configuration.getInstance().textwidth - indentLevel - 2;
     const indent = Array(indentLevel + 1).join(" ");
 
     // Chunk the lines by commenting style.

src/configuration/configuration.ts

@@ -59,6 +59,7 @@ export class Configuration {
   useSystemClipboard = false;
   useCtrlKeys = false;
   scroll = 20;
+  textwidth = 80;
   hlsearch = false;
   ignorecase = true;
   smartcase = true;