--- a/src/os/windows/env.cpp
+++ b/src/os/windows/env.cpp
@@ -144,12 +144,12 @@
   *    Windows 98             4.10    PlatformID 1
   *    Windows 95             4.0     PlatformID 1
   *    Windows NT 3.51        3.51    PlatformID 2
-  *    Windows NT 3.5	        3.5     PlatformID 2
+  *    Windows NT 3.5          3.5     PlatformID 2
   *    Windows for Workgroups 3.11    PlatformID 0
-  *    Windows NT 3.1	        3.10    PlatformID 2
-  *    Windows 3.0	          3.0     n/a
+  *    Windows NT 3.1          3.10    PlatformID 2
+  *    Windows 3.0            3.0     n/a
   *    Windows 2.0            2.??    n/a
-  *    Windows 1.0	          1.??    n/a
+  *    Windows 1.0            1.??    n/a
   *
   */