chore: remove redundant words in comment

Signed-off-by: lvyaoting <[email protected]>

Author: lvyaoting

CONTRIBUTING.md

@@ -579,7 +579,7 @@ _Do_ document things that are not clear, e.g.:
 Keep in mind that better variable names can reduce the need for comments, e.g.:
 
 - `burnblock_height` instead of `height` may eliminate the need to comment that `height` refers to a burnblock height
-- `process_microblocks` instead of `process_blocks` is more correct, and may eliminate the need to to explain that the inputs are microblocks
+- `process_microblocks` instead of `process_blocks` is more correct, and may eliminate the need to explain that the inputs are microblocks
 - `add_transaction_to_microblock` explains more than `handle_transaction`, and reduces the need to even read the comment
 
 # Licensing and contributor license agreement

clarity/src/vm/docs/mod.rs

@@ -529,7 +529,7 @@ const LOG2_API: SimpleFunctionAPI = SimpleFunctionAPI {
     snippet: "log2 ${1:expr-1}",
     signature: "(log2 n)",
     description:
-        "Returns the power to which the number 2 must be raised to to obtain the value `n`, rounded 
+        "Returns the power to which the number 2 must be raised to obtain the value `n`, rounded 
 down to the nearest integer. Fails on a negative numbers.
 ",
     example: "(log2 u8) ;; Returns u3

clarity/src/vm/mod.rs

@@ -575,7 +575,7 @@ pub fn execute(program: &str) -> Result<Option<Value>> {
     )
 }
 
-/// Execute for test in in Clarity2, Epoch21, testnet.
+/// Execute for test in Clarity2, Epoch21, testnet.
 #[cfg(any(test, feature = "testing"))]
 pub fn execute_v2(program: &str) -> Result<Option<Value>> {
     execute_with_parameters(