Remove single-argument function call special-case in formatter

Not sure what this special case was trying to achieve, but it's not right. There's no need to handle function call with a single argument differently than the others.

examples/acceptance_tests/script_context/README.md

@@ -20,10 +20,10 @@ for convenience.
 ## Test Coverage
 
 - [ ] Purpose
-  - [x] Spend
-  - [x] Mint
-  - [x] Withdraw
-  - [ ] Publish
+  - [x] spend
+  - [x] mint
+  - [x] withdraw
+  - [ ] publish
 
 - [ ] Transaction
   - [ ] inputs
@@ -35,15 +35,15 @@ for convenience.
 	- [ ] pointer
     - [x] value
     - [x] datum
-        - [x] None
-        - [x] Hash
-        - [x] Inline
+        - [x] none
+        - [x] hash
+        - [x] inline
     - [x] script
-        - [x] None
-	- [x] Reference
+        - [x] none
+	- [x] reference
   - [x] values
-	- [x] Pure Ada
-	- [x] Native assets
+	- [x] pure ada
+	- [x] native assets
   - [x] fee
   - [x] mint
   - [ ] certificates

examples/acceptance_tests/script_context/validators/deploy.ak

@@ -57,12 +57,12 @@ fn assert_first_output(output) {
 fn assert_second_output(output) {
   [
     output.address.stake_credential == Some(
-    Inline(
-    VerificationKeyCredential(
-      #"66666666666666666666666666666666666666666666666666666666",
-    ))
-    )
-    ,
+      Inline(
+        VerificationKeyCredential(
+          #"66666666666666666666666666666666666666666666666666666666",
+        ),
+      ),
+    ),
     when output.datum is {
       InlineDatum(_) -> True
       _ -> error("expected inline datum")

examples/acceptance_tests/script_context/validators/withdrawals.ak

@@ -8,17 +8,17 @@ use aiken/transaction/credential.{
 fn spend(_datum: Void, _redeemer: Void, ctx: ScriptContext) {
   let alice =
     Inline(
-    VerificationKeyCredential(
-      #"22222222222222222222222222222222222222222222222222222222",
-    ))
-    
+      VerificationKeyCredential(
+        #"22222222222222222222222222222222222222222222222222222222",
+      ),
+    )
 
   let bob =
     Inline(
-    ScriptCredential(
-      #"afddc16c18e7d8de379fb9aad39b3d1b5afd27603e5ebac818432a72",
-    ))
-    
+      ScriptCredential(
+        #"afddc16c18e7d8de379fb9aad39b3d1b5afd27603e5ebac818432a72",
+      ),
+    )
 
   [
     when dict.get(ctx.transaction.withdrawals, alice) is {