fix(all): correct minor typos

bigquery/job.go

@@ -401,7 +401,7 @@ type QueryStatistics struct {
 	// UNKNOWN: accuracy of the estimate is unknown.
 	// PRECISE: estimate is precise.
 	// LOWER_BOUND: estimate is lower bound of what the query would cost.
-	// UPPER_BOUND: estiamte is upper bound of what the query would cost.
+	// UPPER_BOUND: estimate is upper bound of what the query would cost.
 	TotalBytesProcessedAccuracy string
 
 	// Describes execution plan for the query.

profiler/integration_test.go

@@ -58,7 +58,7 @@ retry apt-get update >/dev/null
 retry apt-get -y -q install git >/dev/null
 
 # $GOCACHE is required from Go 1.12. See https://golang.org/doc/go1.11#gocache
-# $GOCACHE is explicitly set becasue $HOME is not set when this code runs
+# $GOCACHE is explicitly set because $HOME is not set when this code runs
 mkdir -p /tmp/gocache
 export GOCACHE=/tmp/gocache
 

profiler/proftest/proftest.go

@@ -193,7 +193,7 @@ func (pr *ProfileResponse) HasFunction(functionName string) error {
 	return fmt.Errorf("failed to find function name %s in profile", functionName)
 }
 
-// HasFunctionInFile returns nil if function is present in the specifed file, and an
+// HasFunctionInFile returns nil if function is present in the specified file, and an
 // error if the function/file combination is not present in the profile.
 func (pr *ProfileResponse) HasFunctionInFile(functionName string, filename string) error {
 	if err := pr.CheckNonEmpty(); err != nil {