build, doc: Fix configure script output indentation and typos

configure.ac

@@ -863,7 +863,7 @@ if test x$use_hardening != xno; then
 
   dnl -fcf-protection used with Clang 7 causes ld to emit warnings:
   dnl ld: error: ... <corrupt x86 feature size: 0x8>
-  dnl Use CHECK_LINK_FLAG & --fatal-warnings to ensure we wont use the flag in this case.
+  dnl Use CHECK_LINK_FLAG & --fatal-warnings to ensure we won't use the flag in this case.
   AX_CHECK_LINK_FLAG([-fcf-protection=full],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fcf-protection=full"],, [[$LDFLAG_WERROR]])
 
   dnl stack-clash-protection does not work properly when building for Windows.

doc/external-signer.md

@@ -168,4 +168,4 @@ It then imports descriptors for all support address types, in a BIP44/49/84 comp
 
 The `displayaddress` RPC reuses some code from `getaddressinfo` on the provided address and obtains the inferred descriptor. It then calls `<cmd> --fingerprint=00000000 displayaddress --desc=<descriptor>`.
 
-`sendtoaddress` and `sendmany` check `inputs->bip32_derivs` to see if any inputs have the same `master_fingerprint` as the signer. If so, it calls `<cmd> --fingerprint=00000000 signtransaction <psbt>`. It waits for the device to return a (partially) signed psbt, tries to finalize it and broadcasts the transation.
+`sendtoaddress` and `sendmany` check `inputs->bip32_derivs` to see if any inputs have the same `master_fingerprint` as the signer. If so, it calls `<cmd> --fingerprint=00000000 signtransaction <psbt>`. It waits for the device to return a (partially) signed psbt, tries to finalize it and broadcasts the transaction.