Support syntax for highlighted lines like: ```python hl_lines=“1 3”

2 files changed, 12 insertions, 6 deletions

diff --git a/markdown/extensions/codehilite.py b/markdown/extensions/codehilite.py
index d05d495..7f20efe 100644
--- a/markdown/extensions/codehilite.py
+++ b/markdown/extensions/codehilite.py
@@ -35,14 +35,14 @@ except ImportError:
 def parse_hl_lines(expr):
     """Support our syntax for emphasizing certain lines of code.
 
-    expr should be like '{1,2}' to emphasize lines 1 and 2 of a code block.
+    expr should be like '1 2' to emphasize lines 1 and 2 of a code block.
     Returns a list of ints, the line numbers to emphasize.
     """
     if not expr:
         return []
 
     try:
-        return map(int, expr.strip('{}').split(','))
+        return map(int, expr.split())
     except ValueError:
         return []
 
@@ -151,7 +151,9 @@ class CodeHilite(object):
         (e.i.: :::python), line numbering is left in the current state - off
         by default.
 
-        Also parses optional list of highlight lines, like :::python{1,3}
+        Also parses optional list of highlight lines, like:
+
+            :::python hl_lines="1 3"
         """
 
         import re
@@ -165,7 +167,8 @@ class CodeHilite(object):
             (?:(?:^::+)|(?P<shebang>^[#]!)) # Shebang or 2 or more colons
             (?P<path>(?:/\w+)*[/ ])?        # Zero or 1 path
             (?P<lang>[\w+-]*)               # The language
-            (?P<hl_lines>\{.*?})?           # Maybe hl_lines
+            \s*                             # Arbitrary whitespace
+            (hl_lines="(?P<hl_lines>.*?)")? # Maybe highlight lines
             ''',  re.VERBOSE)
         # search first line for shebang
         m = c.search(fl)
diff --git a/markdown/extensions/fenced_code.py b/markdown/extensions/fenced_code.py
index 64ff769..6ee6759 100644
--- a/markdown/extensions/fenced_code.py
+++ b/markdown/extensions/fenced_code.py
@@ -62,7 +62,7 @@ Optionally backticks instead of tildes as per how github's code block markdown i
 If the codehighlite extension and Pygments are installed, lines can be highlighted:
 
     >>> text = '''
-    ... ```{1,3}
+    ... ```hl_lines="1 3"
     ... line 1
     ... line 2
     ... line 3
@@ -108,7 +108,10 @@ class FencedCodeExtension(Extension):
 
 class FencedBlockPreprocessor(Preprocessor):
     FENCED_BLOCK_RE = re.compile(r'''
-(?P<fence>^(?:~{3,}|`{3,}))[ ]*(\{?\.?(?P<lang>[a-zA-Z0-9_+-]*)\}?)?[ ]*(?P<hl_lines>\{.*?})?[ ]*\n
+(?P<fence>^(?:~{3,}|`{3,}))[ ]*         # Opening ``` or ~~~
+(\{?\.?(?P<lang>[a-zA-Z0-9_+-]*))?[ ]*  # Optional {, and lang
+(hl_lines="(?P<hl_lines>.*?)")?[ ]*     # Optional highlight lines
+}?[ ]*\n                                # Optional closing }
 (?P<code>.*?)(?<=\n)
 (?P=fence)[ ]*$''', re.MULTILINE | re.DOTALL | re.VERBOSE)
     CODE_WRAP = '<pre><code%s>%s</code></pre>'