internal/runtime/maps: fix spelling errors in comments

src/internal/runtime/maps/group.go

@@ -39,7 +39,7 @@ const (
 // On other architectures, bitset uses one byte per slot, where each byte is
 // either 0x80 if the slot is part of the set or 0x00 otherwise. This makes it
 // convenient to calculate for an entire group at once using standard
-// arithemetic instructions.
+// arithmetic instructions.
 type bitset uint64
 
 // first returns the relative index of the first control byte in the group that

src/internal/runtime/maps/map.go

@@ -113,7 +113,7 @@ import (
 // Note that each table has its own load factor and grows independently. If the
 // 1st bucket grows, it will split. We'll need 2 bits to select tables, though
 // we'll have 3 tables total rather than 4. We support this by allowing
-// multiple indicies to point to the same table. This example:
+// multiple indices to point to the same table. This example:
 //
 //	directory (globalDepth=2)
 //	+----+
@@ -365,7 +365,7 @@ func (m *Map) installTableSplit(old, left, right *table) {
 			t := m.directoryAt(uintptr(i))
 			newDir[2*i] = t
 			newDir[2*i+1] = t
-			// t may already exist in multiple indicies. We should
+			// t may already exist in multiple indices. We should
 			// only update t.index once. Since the index must
 			// increase, seeing the original index means this must
 			// be the first time we've encountered this table.
@@ -380,7 +380,7 @@ func (m *Map) installTableSplit(old, left, right *table) {
 		m.dirLen = len(newDir)
 	}
 
-	// N.B. left and right may still consume multiple indicies if the
+	// N.B. left and right may still consume multiple indices if the
 	// directory has grown multiple times since old was last split.
 	left.index = old.index
 	m.replaceTable(left)

src/internal/runtime/maps/table.go

@@ -53,7 +53,7 @@ type table struct {
 
 	// Index of this table in the Map directory. This is the index of the
 	// _first_ location in the directory. The table may occur in multiple
-	// sequential indicies.
+	// sequential indices.
 	//
 	// index is -1 if the table is stale (no longer installed in the
 	// directory).