H2 Console: when editing a row, an empty varchar column was replaced with a single space.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,8 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>Lukas Eder has updated the jOOQ documentation.
+<ul><li>H2 Console: when editing a row, an empty varchar column was replaced with a single space.
+</li><li>Lukas Eder has updated the jOOQ documentation.
 </li><li>Some nested joins could not be executed, for example:
     select * from (select * from (select * from a) a right join b b) c;
 </li><li>MS SQL Server compatibility: ISNULL is now an alias for IFNULL.

h2/src/main/org/h2/server/web/WebApp.java

@@ -1693,6 +1693,9 @@ public class WebApp {
             return "<div style='display: none'>=+</div>" + s;
         } else if (d.equals("null") || d.startsWith("= ") || d.startsWith("=+")) {
             return "<div style='display: none'>= </div>" + PageParser.escapeHtml(d);
+        } else if (d.equals("")) {
+            // PageParser.escapeHtml replaces "" with a non-breaking space
+            return "";
         }
         return PageParser.escapeHtml(d);
     }