diff --git a/doc/diagnostics.html b/doc/diagnostics.html
index aaaf9d33e7..36464760ed 100644
--- a/doc/diagnostics.html
+++ b/doc/diagnostics.html
@@ -17,10 +17,10 @@ Diagnostics solutions can be categorized into the following groups:
 </p>
 
 <ul>
-<li><strong>Profiling</strong> Profiling tools analyze the complexity and costs of a
+<li><strong>Profiling</strong>: Profiling tools analyze the complexity and costs of a
 Go program such as its memory usage and frequently called
 functions to identify the expensive sections of a Go program.</li>
-<li><strong>Tracing:</strong>Tracing is a way to instrument code to analyze latency
+<li><strong>Tracing</strong>: Tracing is a way to instrument code to analyze latency
 throughout the lifecycle of a call or user request. Traces provide an
 overview of how much latency each component contributes to the overall
 latency in a system. Traces can span multiple Go processes.</li>