HBASE-22689 Added line breaks for fix version in JIRA

Signed-off-by: stack <stack@apache.org>

Author: HorizonNet

src/main/asciidoc/_chapters/developer.adoc

@@ -1597,9 +1597,9 @@ branches for past major/minor/maintenance releases and important features and bu
 To determine if a given fix is in a given release purely from the release numbers following rules
 are defined:
 
-Fix version of X.Y.Z => fixed in all releases X.Y.Z' (where Z' = Z).
-Fix version of X.Y.0 => fixed in all releases X.Y'.* (where Y' = Y).
-Fix version of X.0.0 => fixed in all releases X'.\*.* (where X' = X).
+Fix version of X.Y.Z => fixed in all releases X.Y.Z' (where Z' = Z). +
+Fix version of X.Y.0 => fixed in all releases X.Y'.* (where Y' = Y). +
+Fix version of X.0.0 => fixed in all releases X'.\*.* (where X' = X). +
 
 By this policy, fix version of 1.3.0 implies 1.4.0, but 1.3.2 does not imply 1.4.0 as we could not
 tell purely from the numbers which release came first.