chore: avoid adding trailing whitespace to blank lines in stack traces (#6211)

* chore: avoid adding trailing whitespace to blank lines

* link to PR

* trim for node 9 and 10 as well

* remove unecessary double stack when we have one

* trim moar

* trim when adding custom stack trace

* update other snapshots

Author: SimenB

CHANGELOG.md

@@ -191,6 +191,8 @@
   ([#5812](https://github.com/facebook/jest/issues/5812))
 * `[jest-runtime]` [**BREAKING**] Remove `jest.genMockFn` and
   `jest.genMockFunction` ([#6173](https://github.com/facebook/jest/pull/6173))
+* `[jest-message-util]` Avoid adding unnecessary indent to blank lines in stack
+  traces ([#6211](https://github.com/facebook/jest/pull/6211))
 
 ## 22.4.2
 

integration-tests/__tests__/__snapshots__/custom_matcher_stack_trace.test.js.snap

@@ -18,7 +18,7 @@ exports[`works with custom matchers 1`] = `
       46 |     };
       47 | 
       48 |     // This expecation fails due to an error we throw (intentionally)
-      
+
       at __tests__/custom_matcher.test.js:45:13
       at __tests__/custom_matcher.test.js:43:23
       at __tests__/custom_matcher.test.js:42:23

integration-tests/__tests__/__snapshots__/detect_open_handles.js.snap

@@ -22,7 +22,7 @@ exports[`prints out info about open handlers 1`] = `
     > 7 | app.listen({host: 'localhost', port: 0});
         |     ^
       8 | 
-      
+
       at Object.<anonymous> (server.js:7:5)
       at Object.<anonymous> (__tests__/test.js:3:1)"
 `;

integration-tests/__tests__/__snapshots__/each.test.js.snap

@@ -8,16 +8,16 @@ exports[`shows error message when not enough arguments are supplied to tests 1`]
 
     Not enough arguments supplied for given headings:
     left | right
-    
+
     Received:
     Array [
       true,
       true,
       true,
     ]
-    
+
     Missing 1 arguments
-      
+
       at packages/jest-jasmine2/build/each.js:84:17
 
 "

integration-tests/__tests__/__snapshots__/expect-async-matcher.test.js.snap

@@ -10,6 +10,7 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
   ● fail with expected non promise values
 
     Error
+
       Error: Expected value to have length:
         2
       Received:
@@ -20,6 +21,7 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
   ● fail with expected non promise values and not
 
     Error
+
       Error: Expected value to not have length:
         2
       Received:
@@ -43,7 +45,7 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
       25 |     Promise.resolve(2)
       26 |   );
       27 | });
-      
+
       at __tests__/failure.test.js:24:54
       at __tests__/failure.test.js:11:191
       at __tests__/failure.test.js:11:437
@@ -65,7 +67,7 @@ exports[`shows the correct errors in stderr when failing tests 1`] = `
       31 |     Promise.resolve(2)
       32 |   );
       33 | });
-      
+
       at __tests__/failure.test.js:30:61
       at __tests__/failure.test.js:11:191
       at __tests__/failure.test.js:11:437