Address feedback

lib/blocks.js

@@ -57,6 +57,8 @@ var reLineEnding = /\r\n|\n|\r/;
 
 var reTableRow = /^(\|?)(?:(?:\\\||[^|])*\|?)+$/;
 
+var reValidTableDelimiter = /^:?-+:?$/;
+
 var MAX_AUTOCOMPLETED_CELLS = 1000;
 
 // Returns true if string contains only space characters.
@@ -783,7 +785,7 @@ var blockStarts = [
         }
 
         const nextColumn = measureNonspaceColumn(parser.nextLine);
-        if (nextColumn - parser.column >= CODE_INDENT || parser.column - nextColumn >= CODE_INDENT) {
+        if (Math.abs(nextColumn - parser.column) >= CODE_INDENT) {
             // the delimiter row must be on the same indentation level as the header row
             return 0;
         }
@@ -867,7 +869,6 @@ var blockStarts = [
     }
 ];
 
-const reValidTableDelimiter = /^:?-+:?$/;
 const parseDelimiterRow = function(row) {
     if (row.indexOf("|") === -1) {
         return null;

test/tables.txt

@@ -1207,6 +1207,9 @@ Here's a link to [Freedom Planet 2][].
 
 ### Invalid table (MM-55972/MM-59809)
 
+This table is invalid because of the space in the middle of the third column
+of the second line of the table (`:----------------- --------------:`).
+
 ```````````````````````````````` example
 | A | B | C | | |
 | :--------------------------------: | :----------------------------: | :----------------- --------------: | :-----------: |:-----------: |
@@ -1219,6 +1222,9 @@ Here's a link to [Freedom Planet 2][].
 | | J | K | | |</p>
 ````````````````````````````````
 
+This table is invalid because the last column of the delimiter row has no
+dashes in it (`|  |`).
+
 ```````````````````````````````` example
 | 그룹명  | 자산합계1) | 주력업종1) 및 자산 | 비주력업종1) 및 자산 | 소속 금융회사2) |        |        |     |  |
 | ---- | ------ | ----------- | ------------ | --------- | ------ | ------ | --- |  |