Merge pull request #4825 from SataQiu/fix-20190419

Fix spelling mistakes of doc

doc/meetups_notes/06-14-2018.md

@@ -56,7 +56,7 @@ Meeting started at 8am PDT on Zoom.
 
 ### New Vitess Logo / Logo Changes
 
-We kicked off the meeting talking about the first agenda item, *Vitess's new logo*. The new logo was mooted in the first place because of its current similarites to [Vivid IT Corp](https://www.vividitcorp.com/).
+We kicked off the meeting talking about the first agenda item, *Vitess's new logo*. The new logo was mooted in the first place because of its current similarities to [Vivid IT Corp](https://www.vividitcorp.com/).
 
 Based on [logos](https://docs.google.com/forms/d/e/1FAIpQLScp5hGY98vpRMxs3oRT8c-XJ_b04ei6uCFiYiQe3nDunFbyuw/viewform) created with CNCF's help, logos 1 and 4 got the highest no of votes.
 
@@ -124,7 +124,7 @@ We are looking for 5 engineers. Job scope at [our site](https://planetscale.com/
 
 We discussed that we need to work on / update official roadmap.
 
-Question from Ameet about whether there's anything on ther roadmap for online backups, because increasingly backups take more time.
+Question from Ameet about whether there's anything on the roadmap for online backups, because increasingly backups take more time.
 
 Sugu says there are 500 lines of code re backup. But we will discuss this in our roadmap discussions.
 

doc/vtctlReference.md

@@ -530,7 +530,7 @@ Validates that all nodes reachable from the specified keyspace are consistent.
 
 ### WaitForDrain
 
-Blocks until no new queries were observed on all tablets with the given tablet type in the specifed keyspace.  This can be used as sanity check to ensure that the tablets were drained after running vtctl MigrateServedTypes  and vtgate is no longer using them. If -timeout is set, it fails when the timeout is reached.
+Blocks until no new queries were observed on all tablets with the given tablet type in the specified keyspace.  This can be used as sanity check to ensure that the tablets were drained after running vtctl MigrateServedTypes  and vtgate is no longer using them. If -timeout is set, it fails when the timeout is reached.
 
 #### Example