Neovim: add signature help plugin + make use of quotes consistent

home/.config/nvim/lua/pluginmanager.lua

@@ -20,7 +20,7 @@ require('packer').startup(function()
     use {'wbthomason/packer.nvim', opt = true}
 
     -- Colorscheme
-    use({"catppuccin/nvim", as = "catppuccin"})
+    use({'catppuccin/nvim', as = 'catppuccin'})
 
     -- Git in signcolumn
     use 'airblade/vim-gitgutter'
@@ -34,7 +34,7 @@ require('packer').startup(function()
     -- Tabline/bufferline
     use {
         'akinsho/nvim-bufferline.lua',
-        tag = "*",
+        tag = '*',
         requires = 'kyazdani42/nvim-web-devicons'
     }
 
@@ -42,7 +42,7 @@ require('packer').startup(function()
     use 'tpope/vim-fugitive'
 
     -- Indent characters
-    use "lukas-reineke/indent-blankline.nvim"
+    use 'lukas-reineke/indent-blankline.nvim'
 
     -- Tree explorer
     use {'kyazdani42/nvim-tree.lua', requires = 'kyazdani42/nvim-web-devicons'}
@@ -70,13 +70,16 @@ require('packer').startup(function()
     -- Additional LSP features for Java
     use 'mfussenegger/nvim-jdtls'
 
+    -- Display function signature
+    use {'ray-x/lsp_signature.nvim'}
+
     -- Completion
     use 'hrsh7th/nvim-cmp' -- Autocompletion plugin
     use 'hrsh7th/cmp-nvim-lsp' -- LSP source for nvim-cmp
     use 'hrsh7th/cmp-path' -- Path source for nvim-cmp
     use 'saadparwaiz1/cmp_luasnip' -- Snippets source for nvim-cmp
     use 'L3MON4D3/LuaSnip' -- Snippets plugin
-    use "rafamadriz/friendly-snippets" -- Snippets collection
+    use 'rafamadriz/friendly-snippets' -- Snippets collection
 
     -- treesitter syntax highlight
     use {
@@ -118,7 +121,7 @@ require('packer').startup(function()
     use 'habamax/vim-asciidoctor'
 
     -- Modern filetype.vim replacement
-    use("nathom/filetype.nvim")
+    use('nathom/filetype.nvim')
 
 end)