Don't colour diff headers white, only bold (GH-2691)

So people with light themed terminals can still read 'em.

diff --git a/CHANGES.md b/CHANGES.md
index 87e36f4dbe7e7b57cb22ebe63c5be012aec67344..c73295c4a0dad077a8fb0503135eb5ca6c063099 100644 (file)
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -7,6 +7,8 @@
 - Improve error message for invalid regular expression (#2678)
 - Fix mapping cases that contain as-expressions, like `case {"key": 1 | 2 as password}`
   (#2686)
+- No longer color diff headers white as it's unreadable in light themed terminals
+  (#2691)
 
 ## 21.12b0
 

diff --git a/src/black/output.py b/src/black/output.py
index f030d0a0d08d67f07acc5516749ceb5095913a5a..9561d4b57d2a9b522de86a26a90d23413f09bd14 100644 (file)
--- a/src/black/output.py
+++ b/src/black/output.py
@@ -81,7 +81,7 @@ def color_diff(contents: str) -> str:
     lines = contents.split("\n")
     for i, line in enumerate(lines):
         if line.startswith("+++") or line.startswith("---"):
-            line = "\033[1;37m" + line + "\033[0m"  # bold white, reset
+            line = "\033[1m" + line + "\033[0m"  # bold, reset
         elif line.startswith("@@"):
             line = "\033[36m" + line + "\033[0m"  # cyan, reset
         elif line.startswith("+"):

diff --git a/tests/test_black.py b/tests/test_black.py
index 2d0a7dfd4e233ebecc906115c637e15dfcc145ba..468f00fcafb82c43a2cca3677cec918f3518b5f3 100644 (file)
--- a/tests/test_black.py
+++ b/tests/test_black.py
@@ -200,7 +200,7 @@ class BlackTestCase(BlackBaseTestCase):
         )
         actual = result.output
         # Again, the contents are checked in a different test, so only look for colors.
-        self.assertIn("\033[1;37m", actual)
+        self.assertIn("\033[1m", actual)
         self.assertIn("\033[36m", actual)
         self.assertIn("\033[32m", actual)
         self.assertIn("\033[31m", actual)
@@ -323,7 +323,7 @@ class BlackTestCase(BlackBaseTestCase):
         actual = result.output
         # We check the contents of the diff in `test_expression_diff`. All
         # we need to check here is that color codes exist in the result.
-        self.assertIn("\033[1;37m", actual)
+        self.assertIn("\033[1m", actual)
         self.assertIn("\033[36m", actual)
         self.assertIn("\033[32m", actual)
         self.assertIn("\033[31m", actual)