minor CHANGELOG amendments in preparation for generating hyperlinks

[skip ci]

CHANGELOG.md

@@ -18,7 +18,7 @@ Released: March 06, 2018
   - Fixed invalid memory access if input_buffer size is zero (a602c65354a4b595821d2300f38ebc107d07e2a9)
   - Fixed handling of an empty polygon in grid_vertex_converter (2f2dcf1eeae71aaa7878f4bc9a39741321f07e68)
   - Fixed PROJ_LIB detection logic (44f1ae3a6e9e9979d1a93343f40db6cd7dbf51d5)
-    - Default to `icu-config` for obtaining `ICU_DATA` if `u_getDataDirectory fails (2cef98d7f76cdd302afcf15f1c585379537e8f1d)
+  - Default to `icu-config` for obtaining `ICU_DATA` if `u_getDataDirectory` fails (2cef98d7f76cdd302afcf15f1c585379537e8f1d)
 
 ## 3.0.18
 
@@ -134,7 +134,7 @@ Released: September 8, 2016
 - Added geojson unit test for property types/values
 - JSON - added support for object and array type in `json_value` and update `stringifier`
 - GDAL.input - fallback to using `overviews` if present (8e8482803bb435726534c3b686a56037b7d3e8ad)
-- TopoJSON.input - improved and simplified grammer/parser implementation (https://github.com/mapnik/mapnik/pull/3429)
+- TopoJSON.input - improved and simplified grammar/parser implementation (https://github.com/mapnik/mapnik/pull/3429)
 - GDAL.input - Added support for non-alpha mask band
 - TopoJSON.input - fixed order of ellements limitation (ref #3434)
 - Fixed stroke-width size not included in markers ellipse bounding box (ref #3445)
@@ -419,7 +419,7 @@ The 3.0 release is a major milestone for Mapnik and includes many performance an
 
 - Supports being built with clang++ using `-fvisibility=hidden -flto` for smaller binaries
 
-- Supports being built with Visual Studio 2014 CTP #3
+- Supports being built with Visual Studio 2014 CTP \#3
 
 - Shield icons are now pixel snapped for crisp rendering
 
@@ -680,7 +680,7 @@ Summary: The 2.2.0 release is primarily a performance and stability release. The
 
 - Added support for `background-image` in cairo_renderer (#1724)
 
-- Fixed building symbolizer rendering to be fully sensitive to alpha (8b66128c892 / bc8ea1c5a7a)
+- Fixed building symbolizer rendering to be fully sensitive to alpha (8b66128c892, bc8ea1c5a7a)
 
 - `<Filter>[attr]</Filter>` now returns false if attr is an empty string (#1665)
 
@@ -845,7 +845,7 @@ Released Aug 3, 2012
 
 - XML: Fixed to avoid throwing if a `<Parameters>` element is encountered (which is supported in >= 2.1.x)
 
-- Support for PostGIS 2.0 in the pgsql2sqlite command (e69c44e/47e5b3c)
+- Support for PostGIS 2.0 in the pgsql2sqlite command (e69c44e, 47e5b3c)
 
 - Fixed reference counting of Py_None when returning null attributes from Postgres during UTFGrid encoding, which could cause a Fatal Python error: deallocating None (#1221)
 
@@ -888,7 +888,7 @@ Released April 10, 2012
 
 - Fix to avoid modifying a feature if an attribute is requested that does not exist (0f5ab18ed)
 
-- Fixed ability to save to jpeg format from python (7387afd9) (#896)
+- Fixed ability to save to jpeg format from python (7387afd96) (#896)
 
 
 ## Mapnik 2.0.0
@@ -1035,7 +1035,7 @@ Released Oct 18, 2011
 
 Released March 23, 2010
 
-(Packaged from r1745/db89f1ca75)
+(Packaged from db89f1ca75 / r1745)
 
 - Rasters: Various fixes and improvements to 8bit png output ([#522](https://github.com/mapnik/mapnik/issues/522),[#475](https://github.com/mapnik/mapnik/issues/475))
 
@@ -1077,7 +1077,7 @@ Released March 23, 2010
 
 Released January, 19 2010
 
-(Packaged from r1574/a0da946be9)
+(Packaged from a0da946be9 / r1574)
 
 - Core: Fixed linking to external libagg (r1297,r1299)
 
@@ -1219,7 +1219,7 @@ Released January, 19 2010
 
 Released July 14, 2009
 
-(Packaged from r1247/353ff576c7)
+(Packaged from 353ff576c7 / r1247)
 
 - Plugins: expose list of registered plugins as a `plugin_names()` method of DatasourceCache (r1180)
 
@@ -1304,7 +1304,7 @@ Released July 14, 2009
 
 Released April 1, 2009
 
-(Packaged from r1066/c88e03436f)
+(Packaged from c88e03436f / r1066)
 
 - Python: Added support for aspect_fix_mode (r1013)