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lesson_check.py: harden single-line image/link pattern #597

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May 9, 2021
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lesson_check.py: harden single-line image/link pattern #597

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11 changes: 10 additions & 1 deletion bin/lesson_check.py
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,16 @@
P_INTERNAL_INCLUDE_LINK = re.compile(r'^{% include ([^ ]*) %}$')

# Pattern to match image-only and link-only lines
P_LINK_IMAGE_LINE = re.compile("^[> ]*(!?)\[([^]]+)\][([]([^)]+)[])][ ]*$")
P_LINK_IMAGE_LINE = re.compile(r'''
[> #]* # any number of '>', '#', and spaces
!? # ! or nothing
\[[^]]+\] # [any text]
[([] # ( or [
[^])]+ # 1+ characters that are neither ] nor )
[])] # ] or )
(?:{:[^}]+})? # {:any text} or nothing
[ ]* # any number of spaces
\\?$ # \ or nothing + end of line''', re.VERBOSE)

# What kinds of blockquotes are allowed?
KNOWN_BLOCKQUOTES = {
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