diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index 16f4b7a73fa9ce2669cbeb647cf9b77a4e449bdb..5ce92dea20d4644c059099a63cbcf205a62d99d9 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -5558,7 +5558,7 @@ declare module 'vscode' {
 		 * is no longer visible.
 		 *
 		 * Normally the webview panel's html context is created when the panel becomes visible
-		 * and destroyed when it is is hidden. Extensions that have complex state
+		 * and destroyed when it is hidden. Extensions that have complex state
 		 * or UI can set the `retainContextWhenHidden` to make VS Code keep the webview
 		 * context around, even when the webview moves to a background tab. When a webview using
 		 * `retainContextWhenHidden` becomes hidden, its scripts and other dynamic content are suspended.
diff --git a/src/vs/workbench/services/themes/common/fileIconThemeSchema.ts b/src/vs/workbench/services/themes/common/fileIconThemeSchema.ts
index 99346badcb626e5e79a79ba4b8b539817fae9377..41795ef77f068f3853763af1fcf4ff3d3bee0bba 100644
--- a/src/vs/workbench/services/themes/common/fileIconThemeSchema.ts
+++ b/src/vs/workbench/services/themes/common/fileIconThemeSchema.ts
@@ -29,7 +29,7 @@ const schema: IJSONSchema = {
 		},
 		folderNames: {
 			type: 'object',
-			description: nls.localize('schema.folderNames', 'Associates folder names to icons. The object key is is the folder name, not including any path segments. No patterns or wildcards are allowed. Folder name matching is case insensitive.'),
+			description: nls.localize('schema.folderNames', 'Associates folder names to icons. The object key is the folder name, not including any path segments. No patterns or wildcards are allowed. Folder name matching is case insensitive.'),
 			additionalProperties: {
 				type: 'string',
 				description: nls.localize('schema.folderName', 'The ID of the icon definition for the association.')
@@ -37,7 +37,7 @@ const schema: IJSONSchema = {
 		},
 		folderNamesExpanded: {
 			type: 'object',
-			description: nls.localize('schema.folderNamesExpanded', 'Associates folder names to icons for expanded folders. The object key is is the folder name, not including any path segments. No patterns or wildcards are allowed. Folder name matching is case insensitive.'),
+			description: nls.localize('schema.folderNamesExpanded', 'Associates folder names to icons for expanded folders. The object key is the folder name, not including any path segments. No patterns or wildcards are allowed. Folder name matching is case insensitive.'),
 			additionalProperties: {
 				type: 'string',
 				description: nls.localize('schema.folderNameExpanded', 'The ID of the icon definition for the association.')
@@ -45,7 +45,7 @@ const schema: IJSONSchema = {
 		},
 		fileExtensions: {
 			type: 'object',
-			description: nls.localize('schema.fileExtensions', 'Associates file extensions to icons. The object key is is the file extension name. The extension name is the last segment of a file name after the last dot (not including the dot). Extensions are compared case insensitive.'),
+			description: nls.localize('schema.fileExtensions', 'Associates file extensions to icons. The object key is the file extension name. The extension name is the last segment of a file name after the last dot (not including the dot). Extensions are compared case insensitive.'),
 
 			additionalProperties: {
 				type: 'string',
@@ -54,7 +54,7 @@ const schema: IJSONSchema = {
 		},
 		fileNames: {
 			type: 'object',
-			description: nls.localize('schema.fileNames', 'Associates file names to icons. The object key is is the full file name, but not including any path segments. File name can include dots and a possible file extension. No patterns or wildcards are allowed. File name matching is case insensitive.'),
+			description: nls.localize('schema.fileNames', 'Associates file names to icons. The object key is the full file name, but not including any path segments. File name can include dots and a possible file extension. No patterns or wildcards are allowed. File name matching is case insensitive.'),
 
 			additionalProperties: {
 				type: 'string',