Fix spurious whitespace (#463)

This was introduced by #314 where `line` should have been `softline`. By the way, I was going to propose renaming `line` to `line_or_space` and `softline` to `line_or_nothing` which should make it more explicit what is going on.

Fixes #461

src/printer.js

@@ -627,7 +627,7 @@ function genericPrintNoParens(path, options, print) {
                   indent(options.tabWidth, concat([softline, printedValue]))
                 ])
               ),
-              line,
+              softline,
               ifBreak(")")
             ])
           );

tests/trailing_comma/__snapshots__/jsfmt.spec.js.snap

@@ -77,6 +77,11 @@ const aLong = {
   },
   dHasALongName: \'a-long-value-too\'
 };
+
+const aLong = {
+  dHasALongName: \'a-long-value-too\',
+  eHasABooleanExpression: a === a,
+};
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const a = { b: true, c: { c1: \"hello\" }, d: false };
 
@@ -88,6 +93,11 @@ const aLong = {
   },
   dHasALongName: \"a-long-value-too\"
 };
+
+const aLong = {
+  dHasALongName: \"a-long-value-too\",
+  eHasABooleanExpression: a === a
+};
 "
 `;
 
@@ -108,6 +118,11 @@ const aLong = {
   },
   dHasALongName: \'a-long-value-too\'
 };
+
+const aLong = {
+  dHasALongName: \'a-long-value-too\',
+  eHasABooleanExpression: a === a,
+};
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 const a = { b: true, c: { c1: \"hello\" }, d: false };
 
@@ -119,5 +134,10 @@ const aLong = {
   },
   dHasALongName: \"a-long-value-too\",
 };
+
+const aLong = {
+  dHasALongName: \"a-long-value-too\",
+  eHasABooleanExpression: a === a,
+};
 "
 `;

tests/trailing_comma/object.js

@@ -14,3 +14,8 @@ const aLong = {
   },
   dHasALongName: 'a-long-value-too'
 };
+
+const aLong = {
+  dHasALongName: 'a-long-value-too',
+  eHasABooleanExpression: a === a,
+};