Merge pull request braydie#82 from mmarica/patch-2

Fix typo in How to Deal with Intermittent Bugs

Author: braydie

en/1-Beginner/Personal-Skills/10-How to Deal with Intermittent Bugs.md

@@ -2,7 +2,7 @@
 
 The intermittent bug is a cousin of the 50-foot-invisible-scorpion-from-outer-space kind of bug. This nightmare occurs so rarely that it is hard to observe, yet often enough that it can't be ignored. You can't debug because you can't find it.
 
-Although after 8 hours you will start to doubt it, the intermittent bug has to obey the same laws of logic everything else does. What makes it hard is that it occurs only under unknown conditions. Try to record the circumstances under which the bug does occur, so that you can guess at what the variability really is. The condition may be related to data values, such as ‘This only happens when we enter *Wyoming* as a value.’ If that is not the source of variability, the next suspect should be improperly synchronized concurrency.
+Although after 8 hours you will start to doubt it, the intermittent bug has to obey the same laws of logic everything else does. What makes it hard is that it occurs only under unknown conditions. Try to record the circumstances under which the bug does occur, so that you can guess what the variability really is. The condition may be related to data values, such as ‘This only happens when we enter *Wyoming* as a value.’ If that is not the source of variability, the next suspect should be improperly synchronized concurrency.
 
 Try, try, try to reproduce the bug in a controlled way. If you can't reproduce it, set a trap for it by building a logging system, a special one if you have to, that can log what you guess you need when it really does occur. Resign yourself to that if the bug only occurs in production and not at your whim, this may be a long process. The hints that you get from the log may not provide the solution but may give you enough information to improve the logging. The improved logging system may take a long time to be put into production. Then, you have to wait for the bug to reoccur to get more information. This cycle can go on for some time.