Add line-height: 1em to theme styles that set the font bold

Otherwise, you'd get a cursor/text misalignment in some fonts.

theme/eclipse.css

 .cm-s-eclipse span.cm-meta {color: #FF1717;}
-.cm-s-eclipse span.cm-keyword { font-weight: bold; color: #7F0055; }
+.cm-s-eclipse span.cm-keyword { line-height: 1em; font-weight: bold; color: #7F0055; }
 .cm-s-eclipse span.cm-atom {color: #219;}
 .cm-s-eclipse span.cm-number {color: #164;}
 .cm-s-eclipse span.cm-def {color: #00f;}

theme/neat.css

 .cm-s-neat span.cm-comment { color: #a86; }
-.cm-s-neat span.cm-keyword { font-weight: bold; color: blue; }
+.cm-s-neat span.cm-keyword { line-height: 1em; font-weight: bold; color: blue; }
 .cm-s-neat span.cm-string { color: #a22; }
-.cm-s-neat span.cm-builtin { font-weight: bold; color: #077; }
-.cm-s-neat span.cm-special { font-weight: bold; color: #0aa; }
+.cm-s-neat span.cm-builtin { line-height: 1em; font-weight: bold; color: #077; }
+.cm-s-neat span.cm-special { line-height: 1em; font-weight: bold; color: #0aa; }
 .cm-s-neat span.cm-variable { color: black; }
 .cm-s-neat span.cm-number, .cm-s-neat span.cm-atom { color: #3a3; }
 .cm-s-neat span.cm-meta {color: #555;}