Fix tab minification

Author: Igor Oleinikov

src/__tests__/baselines/minification-only/issue142.tsx.baseline

@@ -33,7 +33,7 @@ TypeScript before transform:
 TypeScript after transform:
 
   declare const styled: any;
-  const Header = styled.div \`	display:flex;	 align-items:center;	justify-content:space-between;	 	 font-weight:600;	padding:0.8em 1.6em;	 	 	background:peachpuff;\`;
+  const Header = styled.div \`display:flex;align-items:center;justify-content:space-between;font-weight:600;padding:0.8em 1.6em;background:peachpuff;\`;
 
 
 

src/__tests__/baselines/minification/issue142.tsx.baseline

@@ -33,7 +33,7 @@ TypeScript before transform:
 TypeScript after transform:
 
   declare const styled: any;
-  const Header = styled.div.withConfig({ displayName: "Header" }) \`	display:flex;	 align-items:center;	justify-content:space-between;	 	 font-weight:600;	padding:0.8em 1.6em;	 	 	background:peachpuff;\`;
+  const Header = styled.div.withConfig({ displayName: "Header" }) \`display:flex;align-items:center;justify-content:space-between;font-weight:600;padding:0.8em 1.6em;background:peachpuff;\`;
 
 
 

src/minify.ts

@@ -14,11 +14,15 @@ function isSymbol(ch: string) {
     return ch == ';' || ch == ':' || ch == '{' || ch == '}' || ch == ',';
 }
 
+function isSpace(ch: string) {
+    return ch == ' ' || ch == '\n' || ch == '\r' || ch == '\t';
+}
+
 const stateMachine: StateMachine = {
     ';': {
         next(ch) {
             if (ch == '\'' || ch == '"' || ch == '(') return { state: ch }
-            if (ch == ' ' || ch == '\n' || ch == '\r') return { skipEmit: true }
+            if (isSpace(ch)) return { skipEmit: true }
             if (ch == '/') return { state: ';/', skipEmit: true }
             if (isSymbol(ch)) return;
             return { state: 'x' }
@@ -30,7 +34,7 @@ const stateMachine: StateMachine = {
     ';$': { // after placeholder
         next(ch) {
             if (ch == '\'' || ch == '"' || ch == '(') return { state: ch }
-            if (ch == ' ' || ch == '\n' || ch == '\r') return { skipEmit: true, state: ' ' } // we may need a space
+            if (isSpace(ch)) return { skipEmit: true, state: ' ' } // we may need a space
             if (ch == '/') return { state: '/', skipEmit: true }
             if (isSymbol(ch)) return { state: ';' };
             return { state: 'x' }
@@ -39,15 +43,15 @@ const stateMachine: StateMachine = {
     'x': {
         next(ch) {
             if (ch == '\'' || ch == '"' || ch == '(') return { state: ch }
-            if (ch == ' ' || ch == '\n' || ch == '\r') return { state: ' ', skipEmit: true }
+            if (isSpace(ch)) return { state: ' ', skipEmit: true }
             if (ch == '/') return { state: '/', skipEmit: true }
             if (isSymbol(ch)) return { state: ';' };
         }
     },
     ' ': { // may need space
         next(ch) {
             if (ch == '\'' || ch == '"' || ch == '(') return { state: ch, emit: ' ' + ch }
-            if (ch == ' ' || ch == '\n' || ch == '\r') return { state: ' ', skipEmit: true }
+            if (isSpace(ch)) return { state: ' ', skipEmit: true }
             if (ch == '/') return { state: '/', skipEmit: true }
             if (isSymbol(ch)) return { state: ';' };
             return { state: 'x', emit: ' ' + ch };
@@ -59,7 +63,7 @@ const stateMachine: StateMachine = {
     '\n': { // may need new line
         next(ch) {
             if (ch == '\'' || ch == '"' || ch == '(') return { state: ch, emit: '\n' + ch }
-            if (ch == ' ' || ch == '\n' || ch == '\r') return { state: '\n', skipEmit: true }
+            if (isSpace(ch)) return { state: '\n', skipEmit: true }
             if (ch == '/') return { state: '/', emit: '\n' }
             if (isSymbol(ch)) return { state: ';', emit: '\n' + ch };
             return { state: 'x', emit: '\n' + ch };