diff --git a/README.md b/README.md
index 7082979..1fcab38 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Use python to make minetest maps from worlds.
 * The colors.txt should be generated by <https://github.com/expertmm/EnlivenMinetest/blob/master/mtanalyze/minetestinfo.py> for the most complete colors list (unless you use the more complicated [minetestmapper method]([https://github.com/minetest/minetestmapper])) and prettiest map until that code is moved from EnlivenMinetest to the minetestmapper-python project.
 
 ## Known Issues:
-* has exception for unknown reason which may be related to why it doesn't draw higher than y=0 see `print("<Could not finish writing r error since r was not initialized>")`
+* has exception for unknown reason which may be related to why it doesn't draw higher than y=0 see uses of `"<Could not finish writing r error since r was not initialized>"` message variable
 * conform minetestmapper-numpy.py to official minetestmapper:
   * make input path to go after an `-i` param instead of being positional
   * make output path to go after an `-o` param instead of being positional
@@ -36,14 +36,16 @@ Use python to make minetest maps from worlds.
 ## Changes
 ### (2018-02-15)
 * expertmm made new repo <https://github.com/expertmm/minetestmapper-python> to contain:
-  * minetestmapper files that were discontinued (from official minetest's minetest/util); as separate commit, added expertmm fork of minetestmapper.py (deleted expertmm minetest fork where only the script was changed, deleted copy of the same changed version of the script at expertmm EnlivenMinetest/mtanalyze -- see changes by expertmm at previous dates in this changelog)
-  * minetestmapper-numpy.py by spillz (as separate commit, added forked version of it from expertmm EnlivenMinetest/mtanalyze and deleted it from there--see changes by expertmm at previous dates in this changelog)
+  * minetestmapper files that were discontinued (from official minetest's minetest/util)
+    * as separate commit, replaced it with expertmm fork of minetestmapper.py (deleted expertmm minetest fork where only the script was changed, deleted copy of the same changed version of the script at expertmm EnlivenMinetest/mtanalyze -- see changes by expertmm at previous dates in this changelog)
+  * minetestmapper-numpy.py by spillz
+    * as separate commit, replaced it with expertmm fork of minetestmapper-numpy.py from  EnlivenMinetest/mtanalyze and deleted it from there--see changes by expertmm at previous dates in this changelog)
 * clarified license notices within python files
 * (minetestmapper-numpy.py) changed minheight and maxheight to --min-y and --max-y to conform to official minetestmapper
 * (minetestmapper.py) for now, silently ignore drawalpha, noshading, min-y, max-y, backend, zoom, colors, scales for compatibility with official minetestmapper
 * (minetestmapper-numpy.py) for now silently ignore drawalpha, noshading, geometry, scales, colors, backend (and rename `pixelspernode` param to `zoom`) for compatibility with official minetestmapper
 ### (2018-02-14)
-* (minetestmapper-numpy.py) fixed exception while showing exception (see "Could not finish writing r error since r was not initialized")--the original exception occurs for unknown reason
+* (minetestmapper-numpy.py) fixed exception while showing exception (see uses of "<Could not finish writing r error since r was not initialized>" message variable)--the original exception occurs for unknown reason
 ### (2017-04-12)
 * (minetestmapper.py) PEP8 compliance
 ### (2017-03-17)