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- update to 0.30.0
  * Use official 0.30 spec.txt.
  * Add `cmark_get_default_mem_allocator()` (#330).  API change: this
    adds a new exported function in cmark.h.
  * Fix #383.  An optimization we used for emphasis parsing was
    too aggressive, causing us to miss some emphasis that was legal
    according to the spec.  We fix this by indexing the `openers_bottom`
    table not just by the type of delimiter and the length of the
    closing delimiter mod 3, but by whether the closing delimiter
    can also be an opener.  (The algorithm for determining emphasis
    matching depends on all these factors.)  Add regression test.
  * Fix quadratic behavior with inline HTML (#299, Nick Wellnhofer).
    Repeated starting sequences like `<?`, `<!DECL ` or `<![CDATA[` could
    lead to quadratic behavior if no matching ending sequence was found.
    Separate the inline HTML scanners. Remember if scanning the whole input
    for a specific ending sequence failed and skip subsequent scans.
  * Speed up hierarchy check in tree manipulation API (Nick Wellnhofer).
    Skip hierarchy check in the common case that the inserted child has
    no children.
  * Fix quadratic behavior when parsing inlines (#373, Nick Wellnhofer).
    The inline parsing code would call `cmark_node_append_child` to append
    nodes. This public function has a sanity check which is linear in the
    depth of the tree. Repeated calls could show quadratic behavior in
    degenerate trees. Use a special function to append nodes without this
    check.  (Issue found by OSS-Fuzz.)
  * Replace invalid characters in XML output (#365, Nick wellnhofer).
    Control characters, U+FFFE and U+FFFF aren't allowed in XML 1.0, so
    replace them with U+FFFD (replacement character). This doesn't solve
    the problem how to roundtrip these characters, but at least we don't
    produce invalid XML. (forwarded request 901085 from mimi_vx)

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- update to 0.29.0
  * Update spec to 0.29.
  * Make rendering safe by default (#239, #273).
    Adds `CMARK_OPT_UNSAFE` and make `CMARK_OPT_SAFE` a no-op (for API
    compatibility).  The new default behavior is to suppress raw HTML and
    potentially dangerous links.  The `CMARK_OPT_UNSAFE` option has to be set
    explicitly to prevent this.
    **NOTE:** This change will require modifications in bindings for cmark
    and in most libraries and programs that use cmark.
    Borrows heavily from @kivikakk's patch in github/cmark-gfm#123.
  * Add sourcepos info for inlines (Yuki Izumi).
  * Disallow more than 32 nested balanced parens in a link (Yuki Izumi).
  * Resolve link references before creating setext header.
    A setext header line after a link reference should not
    create a header, according to the spec.
  * commonmark renderer: improve escaping.
    URL-escape special characters when escape mode is URL, and not otherwise.
    Entity-escape control characters (< 0x20) in non-literal escape modes.
  * render:  only emit actual newline when escape mode is LITERAL.
    For markdown content, e.g., in other contexts we want some
    kind of escaping, not a literal newline.
  * Update code span normalization to conform with spec change.
  * Allow empty `<>` link destination in reference link.
  * Remove leftover includes of `memory.h` (#290).
  * A link destination can't start with `<` unless it is
    an angle-bracket link that also ends with `>` (#289).
    (If your URL really starts with `<`, URL-escape it.)
  * Allow internal delimiter runs to match if both have lengths that are
    multiples of 3.  See commonmark/commonmark#528.
  * Include `references.h` in `parser.h` (#287). (forwarded request 721248 from mimi_vx)

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- update to 0.28.3
 * -smart: open quote can never occur right after ] or ) 
 * Include GNUInstallDirs in src/CMakeLists.txt
 * Fix quadratic behavior in finalize
 * Don't use CMAKE_INSTALL_LIBDIR to create libcmark.pc
 - drop cmark-install_libdir_is_abs.patch (forwarded request 538800 from mimi_vx)

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- update to 0.28.0
  * Update spec.
  * Use unsigned integer when shifting
  * Avoid memcpy'ing NULL pointers
  * DeMorgan simplification of some tests in emphasis parser.
  * Fixed undefined shift in commonmark writer
  * latex writer:  fix memory overflow
  * Check for NULL pointer in get_link_type
  * Move fuzzing dictionary into single file
  * Reset bytes after UTF8 proc
  * Don't scan past an EOL
  * Document cases where `get_` functions return `NULL`
  * Properly handle backslashes in link destinations
  * Fixed `cmark_node_get_list_start` to return 0 for bullet lists,
    as documented
  * Use `CMARK_NO_DELIM` for bullet lists
  * Fixed code for freeing delimiter stack
  * Removed abort outside of conditional (typo).
  * Removed coercion in error message when aborting from buffer.
  * Print message to stderr when we abort due to memory demands
  * `libcmark.pc`: use `CMAKE_INSTALL_LIBDIR`
  * Fixed buffer overflow error in `S_parser_feed`
  * Update emphasis parsing for spec change.
  * Fixes for the LaTeX renderer
    + Don't double-output the link in latex-rendering.
    + Prevent ligatures in dashes sensibly when rendering latex.
      `\-` is a hyphenation, so it doesn't get displayed at all.
  * Added a test for NULL when freeing `subj->last_delim`.
  * Cleaned up setting of lower bounds for openers.
  * Fix #178, quadratic parsing bug.  Add pathological test. (forwarded request 528141 from mimi_vx)

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- update to 0.27.1
* Set policy for CMP0063 to avoid a warning
* Use VERSION_GREATER to clean up cmake version test (forwarded request 441033 from mimi_vx)

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- update to 0.26.1
* Removed unnecessary typedef that caused build failure on some platforms.
* Use $(MAKE) in Makefile instead of hardcoded make (forwarded request 409117 from mimi_vx)

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CommonMark parsing and rendering library and program in C

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