fix wrong english grammar in comments

Signed-off-by: Augustin Husson <husson.augustin@gmail.com>

Author: Nexucis

rest/api.go

@@ -71,7 +71,7 @@ func (d *lspData) position() (protocol.Position, error) {
 	}, nil
 }
 
-// API is the struct that manages the different endpoint provided by the langServer.
+// API is the struct that manages the different endpoints provided by the language server REST API.
 // It also takes care of creating all necessary HTTP middleware.
 type API struct {
 	langServer    langserver.HeadlessServer

rest/doc.go

@@ -23,11 +23,11 @@ Supported endpoints:
 	/hover
 	/signatureHelp
 
-All endpoint are only available through the HTTP method POST. For each request, you have to provide the following JSON:
+All endpoints are only available through the HTTP method POST. For each request, you have to provide the following JSON:
 
 {
   "expr": "a PromQL expression" # Mandatory for all available endpoints
-  "limit": 45  # Optional. It will be used only for the endpoints /diagnostics and /completion. It's the maximum number of result returned.
+  "limit": 45  # Optional. It will be used only for the endpoints /diagnostics and /completion. It's the maximum number of results returned.
   "positionLine": 0 # Mandatory for the endpoints /signatureHelp, /hover and /completion. The line (0 based) for which the metadata is queried.
   "positionChar": 2 # Mandatory for the endpoints /signatureHelp, /hover and /completion. The column (0 based) for which the metadata is queried. Characters are counted as UTF-16 code points.
 }