Added some final touched to test file and code for terminal output. More may be done eventually

src/_pytest/_code/code.py

@@ -1165,11 +1165,28 @@ class ReprEntry(TerminalRepr):
                 else:
                     indents.append(line[:indent_size])
                     source_lines.append(line[indent_size:])
-
+        # print(source_lines)
         tw._write_source(source_lines, indents)
 
         # failure lines are always completely red and bold
+        for i in range(len(failure_lines)):
+            line_list = failure_lines[i].split()
+            # This will swap the extra comma in the multiline string with the position of the starting bracket
+            if len(line_list) == 3 and line_list[2] == "," and line_list[1] == "-":
+                prev_arg = failure_lines[i - 1]
+                failure_lines[i - 1] = failure_lines[i]
+                failure_lines[i] = prev_arg
+
         for line in failure_lines:
+            line_list = line.split()
+            # multiline case seems to be an issue with just an added ','
+            if len(line_list) == 3 and line_list[2] == "," and line_list[1] == "-":
+                line = line.replace(",", "[]")
+                # This is to remove the extra whitespace between '-' and '[]'
+                line_list = list(line)
+                extra_wp_i = line_list.index("-") + 1
+                line_list.pop(extra_wp_i)
+                line = "".join(line_list)
             tw.line(line, bold=True, red=True)
 
     def toterminal(self, tw: TerminalWriter) -> None:

testing/examples/my_test.py

@@ -4,3 +4,19 @@ def test_():
         " displays the full diff."
     ]
     assert m == []
+
+
+def test2_():
+    m = [
+        "This is another check"
+        " This line and the line above should be fine"
+        " Same with this line"
+        " But we should not see the '- ,' appear"
+        " But rather we should see a '- []' appear"
+    ]
+    assert m == []
+
+
+def test3_():
+    m = ["This is some dummy test which shows the strange way in which Pycharm"]
+    assert m == []