Fix coloring of error messages containing '}' symbol (#8277)

lib/spack/llnl/util/tty/color.py

@@ -190,7 +190,7 @@ def __call__(self, match):
         string = styles[style]
         if color:
             if color not in colors:
-                raise ColorParseError("invalid color specifier: '%s' in '%s'"
+                raise ColorParseError("Invalid color specifier: '%s' in '%s'"
                                       % (color, match.string))
             string += ';' + str(colors[color])
 
@@ -215,7 +215,9 @@ def colorize(string, **kwargs):
             codes, for output to non-console devices.
     """
     color = _color_when_value(kwargs.get('color', get_color_when()))
-    return re.sub(color_re, match_to_ansi(color), string)
+    string = re.sub(color_re, match_to_ansi(color), string)
+    string = string.replace('}}', '}')
+    return string
 
 
 def clen(string):
@@ -224,14 +226,14 @@ def clen(string):
 
 
 def cextra(string):
-    """"Length of extra color characters in a string"""
+    """Length of extra color characters in a string"""
     return len(''.join(re.findall(r'\033[^m]*m', string)))
 
 
 def cwrite(string, stream=sys.stdout, color=None):
     """Replace all color expressions in string with ANSI control
        codes and write the result to the stream.  If color is
-       False, this will write plain text with o color.  If True,
+       False, this will write plain text with no color.  If True,
        then it will always write colored output.  If not supplied,
        then it will be set based on stream.isatty().
     """
@@ -246,8 +248,25 @@ def cprint(string, stream=sys.stdout, color=None):
 
 
 def cescape(string):
-    """Replace all @ with @@ in the string provided."""
-    return str(string).replace('@', '@@')
+    """Escapes special characters needed for color codes.
+
+    Replaces the following symbols with their equivalent literal forms:
+
+    =====  ======
+    ``@``  ``@@``
+    ``}``  ``}}``
+    =====  ======
+
+    Parameters:
+        string (str): the string to escape
+
+    Returns:
+        (str): the string with color codes escaped
+    """
+    string = str(string)
+    string = string.replace('@', '@@')
+    string = string.replace('}', '}}')
+    return string
 
 
 class ColorStream(object):