Remove the prefix and indentation for ASCII diagnostic error context

This makes it easier to read, when there are multiple lines as context.

Author: pradyunsg

src/pip/_internal/exceptions.py

@@ -125,7 +125,7 @@ def _string_parts(self) -> Iterator[str]:
         # Present the main message, with relevant context indented.
         yield f"{self.message}\n"
         if self.context is not None:
-            yield _prefix_with_indent("Relevant context: ", self.context)
+            yield f"\n{self.context}\n"
 
         # Space out the note/hint messages.
         if self.attention_stmt is not None or self.hint_stmt is not None:

tests/unit/test_exceptions.py

@@ -73,8 +73,9 @@ def test_complete(self) -> None:
 
             Oh no!
             It broke. :(
-            Relevant context: Something went wrong
-                              very wrong.
+
+            Something went wrong
+            very wrong.
 
             Note: You did something wrong, which is what caused this error.
             Hint: Do it better next time, by trying harder.
@@ -117,8 +118,9 @@ def test_no_note(self) -> None:
 
             Oh no!
             It broke. :(
-            Relevant context: Something went wrong
-                              very wrong.
+
+            Something went wrong
+            very wrong.
 
             Hint: Do it better next time, by trying harder.
             """
@@ -139,8 +141,9 @@ def test_no_hint(self) -> None:
 
             Oh no!
             It broke. :(
-            Relevant context: Something went wrong
-                              very wrong.
+
+            Something went wrong
+            very wrong.
 
             Note: You did something wrong, which is what caused this error.
             """
@@ -201,8 +204,9 @@ def test_no_hint_no_note(self) -> None:
 
             Oh no!
             It broke. :(
-            Relevant context: Something went wrong
-                              very wrong.
+
+            Something went wrong
+            very wrong.
             """
         )